Most brown patches on the face belong to a handful of types of facial pigmentation, and they can look alike while behaving very differently. Type and depth decide whether a mark fades, returns or needs checking. This blog will walk you through how to tell the common types apart and when a spot deserves a dermatologist’s attention.
The main types of facial pigmentation
Facial pigmentation is melanin, the pigment made by melanocytes at the base of the epidermis, building up unevenly in the skin. On faces in Singapore, five types account for most of what people notice.
| Type | What it looks like | Where and who | Main driver | Usual depth |
| Melasma | Symmetrical light to dark brown patches | Cheeks, forehead, upper lip; mostly adult women | Sun exposure and hormones | Epidermal, dermal or mixed |
| Solar lentigo (sunspot) | Separate flat brown spots with clear edges | Sun-exposed face; common in Asian skin | Cumulative UV | Epidermal |
| Post-inflammatory hyperpigmentation | Flat brown to grey marks | Sites of old acne, eczema, injury or procedures | Inflammation | Epidermal or dermal |
| Freckles (ephelides) | Small light brown spots that darken with sun and lighten without it | Nose and cheeks, from childhood | Genetics and UV | Epidermal |
| Hori’s naevus | Brown or slate-grey specks, usually on both cheekbones | Mostly Chinese women, onset around age 30 | Family history; aggravated by sun and pregnancy | Dermal |
Solar lentigines are a marker of cumulative sun exposure and often sit alongside other signs of sun damage such as rough texture and fine lines.
Hori’s naevus is less familiar, yet common in East Asian skin. In a prospective study of 161 patients at Singapore’s National Skin Centre, published in the British Journal of Dermatology in 2006, every patient was a woman and 155 were Chinese, with a median age of onset of 30. Marks usually began as brown specks on the cheekbones and turned confluent and slate-grey over time. It can coexist with melasma: in a Chinese study of 102 patients with Hori’s naevus, 20.6% had both.
Epidermal, dermal and mixed pigmentation
Depth is the second half of any pigmentation diagnosis. Epidermal pigment sits in the top layer of skin, looks brown with fairly defined edges and tends to lighten faster with treatment. Dermal pigment lies deeper, where the way skin scatters light makes it look grey or blue-grey, and it clears slowly and often incompletely. Mixed pigmentation contains both.
Depth also changes the outlook for melasma: two patches that look similar can respond very differently if one is mostly epidermal and the other mixed, so any timeline given without assessing depth is guesswork.
Telling melasma from sunspots
Melasma forms symmetrical, mirror-image patches influenced by hormones and sun, while sunspots are separate, sharply edged spots driven by cumulative UV. Our guide to melasma vs hyperpigmentation explains how to tell them apart, along with PIH.
What causes post-inflammatory hyperpigmentation
PIH is extra melanin laid down after skin is inflamed, most often by acne, and it is more frequent and longer-lasting in darker skin. Our article on dark marks after acne covers why it happens and what helps it fade.
How dermatologists diagnose pigmentation type
A dermatologist combines a clinical history with a Wood’s lamp examination, which accentuates epidermal pigment, and dermoscopy, keeping biopsy for anything suspicious. That assessment comes before any treatment choice, as set out on our page on pigmentation treatment in Singapore.
Why the wrong treatment can make pigmentation worse
Treatments that clear a stable sunspot can inflame melasma and trigger new pigment, especially in Fitzpatrick skin types III to V. The trial evidence is covered in our article can laser make pigmentation worse.
Harmless brown spot or skin cancer
Most brown spots on the face are benign, but an early melanoma can look like an ordinary sunspot. DermNet’s guide to solar lentigo lists a missed diagnosis of melanoma in situ as a complication, because the two can look alike, and notes that different lesions, including lentigo maligna, can even coexist within a single spot. Lentigo maligna is a form of melanoma in situ that typically develops on chronically sun-damaged facial skin.
Use the ABCDE check as a prompt, not a diagnosis: asymmetry, irregular border, more than one colour, diameter above 6mm and evolution over time. A spot that is changing, bleeding or unlike the others on your face needs a dermatologist’s review, and DermNet advises biopsy wherever there is diagnostic uncertainty. Solar lentigines are also an independent risk factor for melanoma, so people with many sunspots benefit from regular skin cancer screening.
When to see a dermatologist for facial pigmentation
See a dermatologist when a spot is new or changing, when pigmentation keeps returning or has not improved after a few months of consistent sun protection, when it darkened after a facial, peel or laser, or when it looks grey rather than brown. Over-the-counter brightening products can help mild surface marks, but they cannot identify the type, read its depth or rule out a lesion that needs removal.
Timing matters in Singapore, where the National Environment Agency puts the typical daily maximum UV index at 6 to 9. Pigment that is misread and left unprotected tends to keep darkening.
If facial pigmentation is persistent, recurring or changing, book a pigmentation assessment with Dr Ang Sue-May at Skincodes to have the type and depth identified before any treatment begins.
Conclusion
The lesson across every type is the same: pigmentation is defined by its cause and its depth, not by how it looks at a glance, and the most expensive mistake is treating the wrong one. Melasma, sunspots, PIH, and the occasional lesion that needs ruling out all start as a brown mark and end in very different places.
If pigmentation on your face is persistent, recurring, or changing, book a pigmentation assessment with Dr Ang Sue-May at Skincodes for a Wood’s lamp and dermoscopy evaluation before any treatment begins.
Frequently asked questions
What are the most common types of facial pigmentation?
Melasma, solar lentigines (sunspots), post-inflammatory hyperpigmentation, freckles and Hori’s naevus. They differ in pattern and depth: melasma forms symmetrical patches, sunspots are separate spots from cumulative UV, and Hori’s naevus shows as brown to grey specks on the cheekbones.
How is Hori’s naevus different from melasma?
Hori’s naevus appears as brown to slate-grey specks, usually on both cheekbones, and its pigment sits in the dermis. Melasma forms broader brown patches and can be epidermal, dermal or mixed. A National Skin Centre study of 161 patients found Hori’s naevus mainly affects Chinese women, starting around age 30. The two can coexist.
Are freckles the same as sunspots?
No. Freckles are small, genetically influenced spots that appear in childhood, darken with sun and lighten when sun exposure drops. Solar lentigines, or sunspots, develop from cumulative UV damage, have clearer edges and persist year-round.
Can facial pigmentation be removed permanently?
It depends on the type. Sunspots and freckles can often be lightened substantially, though new ones form with continued sun exposure. Melasma is a chronic condition that is managed rather than cured, and dermal pigment such as Hori’s naevus clears slowly. Daily sun protection is needed to keep any result.
Can a dark spot on the face be skin cancer?
Occasionally. Most facial brown spots are benign, but lentigo maligna, an early form of melanoma, can resemble a sunspot on sun-damaged skin. Warning signs include asymmetry, an irregular border, several colours, growth or any change over time. A dermatologist examines suspicious spots with dermoscopy and performs a biopsy when there is doubt.